The user's browser renders the html code as a visual web page. A web page that we commonly see is structured by a bunch of 1 and 0. Rendering process allow the machine to interpret that 1 and 0 into the visual that we currently seeing Hope this helps. Let me know if you need additional help!
Frist gen of computers took forever to load and would crash if someone els in the house picked up the phone now adays are computers are in our pockets. There our phones and they rarely if ever crash
No. Don’t be lazy and do it yourself unless you don’t know